WHITISH GRUBS BORING IN THE STALK 



135 



Fig. 



120.— Adult of the Squash Borer. 

 Slightly enlarged. Original. 



varieties 

 are planted 

 as traps, 



the moths will lay on them rather than on winter 

 varieties. All \'ines should be gathered and 

 burned as soon as mature. Fall cultivation 

 followed by deep spring plowing will kill many 

 of the larvae in the soil or prevent the moths 

 from emerging. Moist earth drawn over the 

 vines at joints will induce the formation of ad- 

 ditional roots, enabling the plant to withstand 

 attack. The \ine may be slit and the borers 

 removed. 



The Potato Stalk-borer (Trichobaris trinotataSsiy) 



The potato stalk-borer is a small, yellowish- 

 white grub, half an inch long, which bores in the 



Eggs are laid on the vines 

 by the adults in early summer. 

 The parent is a handsome moth. 

 There is one generation in the 

 north, but usually two in the 

 south. The larva enters the 

 ground to pass the winter. 



If earlv _ 



Fig. 122. — Adult of the Potato Stalk-horcr. 

 and natural size. Original. 



Fig. 121. — Work of 

 Enlarged the Potato Stalk- 

 borer. Original. 



